Updated to 2.2.1 and lost everything!

As i was updating my iphone to 2.2.1 my USB connection automatically disconnected and reconected (it said that i should use a faster USB connection, 2.00 - which mine is)

Anyway, finally restored & updated it and i have lost everything, all contacts are gone, all my applications (paid and free) are gone.

Is that it, or is there somthing i can do? Looks like ill just have to try and get everything back, but i dont have a habbit of throwing money around because apple couldnt get there USB connection straight.

Im not sure about what the whole 'synching' thing is? Does that backup my contacts and applications?

Also, if i sync my contacts (if i even can) does it just copy them from my phone to the computer or what, what does it do?

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If you download a song or application on the iTunes app or App Store app on your iPhone, you need to sync with iTunes to transfer that file to your computer. Also, if you change Calendar, contact, or any other information on your iPhone, you must sync with iTunes to back up then information. If you did not backup (sync) before you upgraded the firmware, you lost everything. THe only way avoid the sync/backup is to have changed the iTunes settings, slid the Slide To Cancel slider when iTunes was syncing or canceled the sync in iTunes directly.

Syncing will put all of your media and information back on to your iPhone after a restore or firmware upgrade. You just need to connect (your iPhone) to iTunes and wait until it doesn't say Sync in Progress on the iPhone screen or iPhone Sync Complete, Ok To Disconnect on iTunes.

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